Abstract — This paper deals with a low cost solution to obstacle avoidance for a mobile robot. This paper also presents a dynamic steering algorithm which ensures that the robot doesn't have to stop in front of an obstacle which allows robot to navigate smoothly in an unknown environment, avoiding collisions. The obstacle avoidance strategy has been described. Obstacle avoidance strategy and working of robot is greatly dependent on the detection of obstacles by sensors and corresponding response of robot. Working principle of sensors, limitation of their use and obstacle avoidance algorithm has been discussed in detail. There are two 60rpm DC motors used, positive terminal of right motor is connected to pin PB1, its negative terminal to pin PB2 and negative terminal of left motor is connected to pin PB3, its positive terminal to the pin PB4 of PORT B of the microcontroller
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